.lab{max-width:1120px;margin:0 auto;padding:1.75rem 1.5rem 3rem}.lab-crumb{font-size:.8rem;color:var(--color-muted);margin-bottom:.75rem}.lab-crumb a{color:var(--color-muted);text-decoration:none}.lab-crumb span{color:var(--color-text)}.lab-head{margin-bottom:1.1rem}.lab-head h1{font-family:var(--font-display);font-size:clamp(1.5rem,3.2vw,2.3rem);font-weight:900;margin:0 0 .4rem;color:var(--color-text)}.lab-head p{color:var(--color-muted);margin:0;line-height:1.6;max-width:72ch}.lab-stage{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:16px;align-items:start}.lab-card{background:#fff;border:1px solid var(--color-border);border-radius:22px;padding:26px 28px;box-shadow:0 1px 2px #0f172a0a,0 12px 32px #0f172a0f;min-width:0}.lab-dir{display:flex;justify-content:center;flex-wrap:wrap;gap:6px;margin:0 0 20px}.lab-dir button{font:inherit;font-size:.85rem;font-weight:700;min-height:40px;padding:8px 16px;border-radius:12px;border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-text);cursor:pointer}.lab-dir button[aria-pressed=true]{background:#2563eb;border-color:#2563eb;color:#fff;box-shadow:inset 0 0 0 2px #ffffff59}.lab-conv{display:grid;grid-template-columns:1fr auto 1fr;gap:16px;align-items:center}.lab-region{border:3px solid #2563eb;border-radius:16px;background:linear-gradient(180deg,#fff,#f5f8ff);padding:14px 18px 12px;box-shadow:0 2px 10px #2563eb24;min-width:0}.lab-out{border-color:#93c5fd}.lab-rev #regA{order:3;border-color:#93c5fd}.lab-rev #regB{order:1;border-color:#2563eb}.lab-rev .lab-swap{order:2}.lab-region label{display:block;text-align:center;font-size:.74rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:#1d4ed8;margin-bottom:6px}.lab-region input{width:100%;border:0;outline:none;background:transparent;text-align:center;font-family:inherit;font-weight:800;font-size:clamp(1.9rem,4vw,2.8rem);color:var(--color-text);-moz-appearance:textfield;padding:0}.lab-region input::-webkit-outer-spin-button,.lab-region input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}.lab-region:focus-within{box-shadow:0 0 0 4px #2563eb40}.lab-unit{display:block;text-align:center;color:var(--color-muted);font-weight:700;font-size:1rem;overflow-wrap:anywhere}.lab-swap{width:48px;height:48px;border-radius:50%;border:1px solid var(--color-border);background:#fff;color:#2563eb;font-size:1.3rem;cursor:pointer;box-shadow:0 2px 6px #0f172a14}.lab-swap:hover{border-color:#2563eb}.lab-dir button:focus-visible,.lab-swap:focus-visible,.lab-sex button:focus-visible,.lab-qt tr:focus-visible{outline:3px solid #2563eb;outline-offset:2px}.lab-answer{margin:20px 0 0;text-align:center;font-size:1.1rem;color:var(--color-muted);min-height:1.5em;overflow-wrap:anywhere}.lab-answer b{color:var(--color-text);font-size:1.3rem}.lab-gauge{margin:24px auto 0;max-width:620px}.lab-ghead{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:6px 10px;font-size:.82rem;color:var(--color-muted);margin-bottom:10px}.lab-ghead strong{color:var(--color-text);font-size:.9rem}.lab-badge{display:inline-block;white-space:nowrap;padding:3px 10px;border-radius:999px;font-weight:800;font-size:.78rem;color:#fff;background:#64748b}.lab-badge:empty{display:none}.lab-b-low{background:#1d4ed8}.lab-b-ok{background:#15803d}.lab-b-mid{background:#b45309}.lab-b-high{background:#991b1b}.lab-sex{display:inline-flex;gap:4px}.lab-sex button{font:inherit;font-size:.78rem;font-weight:700;padding:4px 10px;min-height:32px;border-radius:9px;border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-text);cursor:pointer}.lab-sex button[aria-pressed=true]{background:#2563eb;border-color:#2563eb;color:#fff}.lab-scale{position:relative;display:flex;height:14px;border-radius:999px;overflow:visible}.lab-scale span{height:100%}.lab-scale span:first-of-type{border-radius:999px 0 0 999px}.lab-scale span:last-of-type{border-radius:0 999px 999px 0}.lab-z-low{background:#93c5fd}.lab-z-ok{background:#4ade80}.lab-z-mid{background:#fbbf24}.lab-z-high{background:#f87171}.lab-mk{position:absolute;top:-6px;width:4px;height:26px;margin-left:-2px;background:var(--color-text);border-radius:2px;box-shadow:0 0 0 2px #fff;transition:left .2s}.lab-mk[hidden]{display:none}.lab-ticks{position:relative;height:18px;font-size:.72rem;color:var(--color-muted);margin-top:6px}.lab-ticks span{position:absolute;transform:translate(-50%);white-space:nowrap}.lab-gnote{font-size:.78rem;color:var(--color-muted);margin:8px 0 0;text-align:center;line-height:1.5}.lab-panel{background:#fff;border:1px solid var(--color-border);border-radius:22px;padding:18px;display:flex;flex-direction:column;gap:18px;min-width:0}.lab-ph{font-size:.74rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--color-muted);margin:0 0 8px}.lab-qt{width:100%;border-collapse:separate;border-spacing:0 4px;font-size:.92rem}.lab-qt th{text-align:left;font-size:.72rem;color:var(--color-muted);font-weight:700;padding:0 10px}.lab-qt td{padding:7px 10px;background:var(--color-surface);color:var(--color-text);font-variant-numeric:tabular-nums}.lab-qt td:first-child{border-radius:9px 0 0 9px;font-weight:700}.lab-qt td:last-child{border-radius:0 9px 9px 0}.lab-qt tbody tr{cursor:pointer}.lab-qt tbody tr:hover td{background:#e0f2fe}.lab-qt tbody tr.on td{background:#dbeafe}.lab-qt tbody tr.on td:first-child{box-shadow:inset 3px 0 #2563eb}.lab-formula{background:#e0f2fe;border-radius:14px;padding:12px 14px}.lab-formula p{margin:0;font-size:.9rem;line-height:1.55;color:var(--color-text)}.lab-more{display:flex;flex-wrap:wrap;gap:6px}.lab-more a{padding:6px 10px;border-radius:10px;border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-text);font-size:.8rem;font-weight:700;text-decoration:none}.lab-more a:hover{border-color:#2563eb;color:#1d4ed8}.lab-pdisc{font-size:.75rem;color:var(--color-muted);line-height:1.5;margin:0}.lab-below{max-width:760px;margin:2.5rem auto 0}.lab-below h2{font-size:1.3rem;color:var(--color-text);margin:2.5rem 0 .75rem}.lab-below>p{color:var(--color-muted);line-height:1.7;margin:0 0 1.5rem}.lab-ref{padding:.85rem 1rem;background:var(--color-surface);border:1px solid var(--color-border);border-radius:10px;font-size:.9rem;color:var(--color-muted);line-height:1.55}.lab-ref strong{color:var(--color-text)}.lab-table{width:100%;border-collapse:collapse;font-size:.95rem}.lab-table th{text-align:left;padding:.5rem;border-bottom:2px solid var(--color-border);color:var(--color-muted)}.lab-table td{padding:.5rem;border-bottom:1px solid var(--color-border);color:var(--color-text)}.lab-faq{margin:0 0 1.25rem}.lab-faq h3{font-size:1.05rem;color:var(--color-text);margin:0 0 .35rem}.lab-faq p{color:var(--color-muted);line-height:1.65;margin:0}.lab-disc{margin:1.5rem 0 0!important;padding:.85rem 1rem;background:var(--color-surface);border:1px solid var(--color-border);border-radius:8px;font-size:.82rem!important;line-height:1.6!important}.lab-links{display:flex;flex-wrap:wrap;gap:.25rem 1rem;line-height:1.8}.lab-links a{color:var(--color-accent)}@media(max-width:1000px){.lab-stage{grid-template-columns:1fr}}@media(max-width:600px){.lab{padding:1.25rem 1rem 2.5rem}.lab-card{padding:18px 14px}.lab-conv{grid-template-columns:1fr;gap:8px}.lab-swap{justify-self:center;transform:rotate(90deg)}}@media(prefers-reduced-motion:reduce){.lab-mk{transition:none}}